220505-13-5Relevant academic research and scientific papers
The enzymatic synthesis of isotopically labelled penicillin Ns with isopenicillin N synthase
Baldwin, Jack E.,Adlington, Robert M.,Crouch, Nicholas P.,Pereira, Ines A.C.
, p. 1145 - 1163 (1998)
The preparation of isotopically labelled penicillin Ns using a chemico-enzymatic approach is described. This route involves the chemical synthesis of variously labelled D,L,D,-aminoadipoyl-cysteinyl-valine tripeptides via well established facile protocols and concludes with the conversion of these tripeptides directly into penicillin Ns by the action of recombinant isopenicillin N synthase. Milligram quantities of isotopically labelled penicillin Ns, which would otherwise represent very challenging and expensive synthetic targets, are readily accessible from this route.
Studies on the exchange of valine-oxygen during the biosynthesis of δ-(L-α-aminoadipoyl)-L-cysteinyl-D-valine
Baldwin,Adlington,Bird,Field,O'Callaghan,Schofield
, p. 1099 - 1108 (2007/10/02)
Incorporation of [4-2H6,18O2]-valine into δ-(L-α-aminoadipoyl)-L-cysteinyl-D-valine (ACV), by intact cells of Cephalosporium acremonium, demonstrated the intracellular exchange of one and both valine oxygen atom
